We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Resistance to Phomopsis Seed Decay Identified in Maturity Group V Soybean Plant Introductions.
- Authors
Shuxian Li; Smith, James R.; Nelson, Randall L.
- Abstract
Phomopsis seed decay (PSD) of soybean, Glycine max (L.) Merr., caused primarily by Phomop41s longicoila Hobbs, is the major cause of poor seed quality in most soybean-growing countries. To identify soybean lines with resistance to PSD, seeds of 208 representative maturity group V soybean plant introductions obtained fbm the USDA Soybean Germplasm Collection in 2006 were plated on cultural medium and assayed for the percentage of Phomopsis seed infection. From these data, 122 PIs without seed infection were selected and field screened under natural infection in Stoneville, MS, in 2007. On the basis of assays of naturally infected seeds from 2006 and 2007, 14 PIs were selected for fUrther evaluation with P. longicolla-inoculated and non inoculated treatments in 2008 and 2009. F~lant introduction 424324B was identified as the rpost PSD-resistant line. It had no Phomopsis infection in the seed plating assays from 2006, 2007, and 2008. In 2009, frequent rainfall durseed maturation led to high levels of seed içlfection by P. longicolla (up to 80%) and other fungal pathogens on most of the soybean lines tested in Stoneville, MS. However, only 1 and 2% of the seeds from P1 424324B were infected by P. Iongicolla in the noninoculated and inoculated treatments, respectively. Plant introduction 458130 was also resistant to PSD, with no need infection from the naturally infected trials in 2006 and 2007 and less than 3% Phomopsis seed infection in the 2008 and 2009 inoculated trails. These resistant accessions can be used to develop cultivars resistant to PSD.
- Subjects
STONEVILLE (Miss.); MISSISSIPPI; GENETICS of disease resistance of plants; PHOMOPSIS; SOYBEAN diseases &; pests; PLANT introduction; SEED quality
- Publication
Crop Science, 2011, Vol 51, Issue 6, p2681
- ISSN
0011-183X
- Publication type
Article
- DOI
10.2135/cropsci2011.03.0162